Stability and dye inclusion of graphene oxide/polyelectrolyte layer-by-layer self-assembled films in saline, acidic and basic aqueous solutions

Szabó, Tamás; Péter, Zsolt; Illés, Erzsébet; Janovák, László; Talyzin, Alexandr V.

doi:10.1016/j.carbon.2016.10.011

Cited by 15 publications

(8 citation statements)

References 39 publications

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“…Self-assembled multilayers have been in the focus of many research groups due to their widespread applications in electrochemical devices, sensors, membranes, smart coatings and biotechnological procedures [1]. In the preparation processes, the sequential adsorption technique is applied, in which polyelectrolytes [2], nanoparticles [3], metal complexes [4], enzymes [5] and other suitable compounds [6,7,8,9] were used in the individual adsorption steps. Different substrates were applied as base for the multilayer formation including both planar surfaces [10] and colloidal particles [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyelectrolyte Mono- and Bilayer Formation on the Colloidal Stability of Layered Double Hydroxide Nanoparticles

et al. 2018

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Sequential adsorption of polyelectrolytes on nanoparticles is a popular method to obtain thin films after deposition. However, the effect of polyelectrolyte multilayer formation on the colloidal stability of the nanoparticles has not been studied in detail. In the present work, layered double hydroxides (LDH) were synthesized and interaction with oppositely and like-charged polyelectrolytes was investigated. Electrophoretic and light scattering measurements revealed that colloidal stability of LDH can be tuned by adsorption of poly(styrene sulfonate) (PSS) on the oppositely charged LDH surface in appropriate doses and thus, unstable or stable dispersions can be designed. Negatively charged LDH of adsorbed PSS monolayer was obtained and a poly(diallyldimethyl ammonium chloride) (PDADMAC) second layer was systematically built on the particles. The obtained polyelectrolyte bilayer provided high colloidal stability for the LDH-PSS-PDADMAC dispersions due to the presence of repulsive interparticle forces of electrostatic and steric origin. The results provide crucial quantitative information on designing highly stable particle-polyelectrolyte systems for the preparation of thin films or immobilization of guest substances between the layers for delivery processes.

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Section: Introductionmentioning

confidence: 99%

Effect of Polyelectrolyte Mono- and Bilayer Formation on the Colloidal Stability of Layered Double Hydroxide Nanoparticles

et al. 2018

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“…Although the coprecipitation [33,34] and chemical grafting [35,36] methods have been used under relatively mild conditions (∼80°C reaction temperature), the presence of bases at elevated temperatures inevitably results in partial deoxygenation of the GO framework [37,38]. Another, more viable strategy is the preliminary functionalization of the magnetite nanoparticles [39], sulfonation of graphene oxide [40], or derivatization of both constituents by coupling azide-modified MNPs with alkyne-functionalized GO as reported by Namvari and Namazi [41].…”

Section: Introductionmentioning

confidence: 99%

A Simple and Scalable Method for the Preparation of Magnetite/Graphene Oxide Nanocomposites under Mild Conditions

Szabó

Nánai

Nesztor

et al. 2018

Advances in Materials Science and Engineering

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Nanostructured composite dispersions containing magnetic nanoparticles (MNPs) and graphene oxide (GO) lamellae have been prepared by a simple and easily scalable room temperature procedure. We show that, owing to the enormous surface area and negative surface charge developed in aqueous GO suspensions, large amounts of positively charged MNPs can be electrostatically attached to the layered host. is procedure is superior to many previous synthesis pathways because it exploits the chargeregulated adhesion of naked MNPs to GO resulting in the formation of stable and uniform nanocomposite materials in a wide composition range without any preliminary functionalization steps or harsh conditions that may lead to chemical degradation of the graphene-based nanosheets.

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“…The adsorption steps can be repeated for several times to obtain the desired number of coating layers. The properties of the LbL self‐assembly constructs can be modulated through adjusting some processing parameters such as coating material concentration, ionic strength of the medium, temperature, PH, washing and drying conditions . An array of materials can be utilized as the assembly blocks for LbL assembly, including natural and synthetic polyelectrolytes, clays, peptides, metal oxides, enzymes, and polymer gels .…”

Section: Lbl Self‐assembly Techniquementioning

confidence: 99%

Biomedical Applications of Layer‐by‐Layer Self‐Assembly for Cell Encapsulation: Current Status and Future Perspectives

Liu

Wang

Zhong

et al. 2018

Adv Healthcare Materials

110

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Encapsulating living cells within multilayer functional shells is a crucial extension of cellular functions and a further development of cell surface engineering. In the last decade, cell encapsulation has been widely utilized in many cutting‐edge biomedical fields. Compared with other techniques for cell encapsulation, layer‐by‐layer (LbL) self‐assembly technology, due to the versatility and tunability to fabricate diverse multilayer shells with controllable compositions and structures, is considered as a promising approach for cell encapsulation. This review summarizes the state‐of‐the‐art and potential future biomedical applications of LbL cell encapsulation. First of all, a brief introduction to the LbL self‐assembly technique, including assembly mechanisms and technologies, is made. Next, different cell encapsulation strategies by LbL self‐assembly techniques are explained. Then, the biomedical applications of LbL cell encapsulation in cell‐based biosensors, cell transplantation, cell/molecule delivery, and tissue engineering, are highlighted. Finally, discussions on the current limitations and future perspectives of LbL cell encapsulation are also provided.

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Stability and dye inclusion of graphene oxide/polyelectrolyte layer-by-layer self-assembled films in saline, acidic and basic aqueous solutions

Cited by 15 publications

References 39 publications

Effect of Polyelectrolyte Mono- and Bilayer Formation on the Colloidal Stability of Layered Double Hydroxide Nanoparticles

Effect of Polyelectrolyte Mono- and Bilayer Formation on the Colloidal Stability of Layered Double Hydroxide Nanoparticles

A Simple and Scalable Method for the Preparation of Magnetite/Graphene Oxide Nanocomposites under Mild Conditions

Biomedical Applications of Layer‐by‐Layer Self‐Assembly for Cell Encapsulation: Current Status and Future Perspectives

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